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Cover Seals
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Gasket O-Ring Seal - Operating Pressure Always Looks for a Way Out
Cover Seals From Freudenberg Sealing Technologies
Even if machine elements under pressure are firmly bolted to one another, there is still a so-called static seal gap that must be sealed. O-Rings – or O-Rings with back rings for improved extrusion stability – are most commonly used. If the requirements are more specialized, one-piece sealing elements made of polyurethane come into use. For example, the requirements may involve gaps for breathing due to major pipe expansion, short pressure rise times or alternating operating pressures. Freudenberg Sealing Technologies offers the most suitable cover seal for any application. They stand for the highest possible operating security and extrusion stability.
Simple and Secure Mounting
Polyurethane material offers outstanding characteristics relating to robustness and form stability – above all, to resist extrusion. As a result, even complex geometries can be manufactured with injection molding or even with turning technologies if a quick delivery is needed. This characteristic makes it possible to use one-piece seals. This especially offers an advantage during mounting since any potential inverted position – as in an O-rings/back ring combination – can be precluded. The profile rings are designed in such a way that they can even be substituted in existing installation spaces for O-ring/back ring systems (Fig. 1).
The high linear force on the seal edges of polyurethane seals also enables their use in related applications. Merkel® Pinmatic is produced with only slight changes in its geometry. It provides the best possible performance in virtually static applications such as knee lever systems or the bearing or joint bolts of injection molding machines (Fig. 2).
Our Products in Detail
Merkel® Cover Seal PU 82
One-piece, dual-action compact seal made of polyurethane. Internal sealing. High operating reliability and extrusion stability. Suited to existing O-ring installation spaces as well as those for O-rings with a back ring.
Merkel® Cover Seal PU 83
One-piece, dual-action compact seal made of polyurethane. Internal sealing. High operating reliability and extrusion stability. Suited to existing O-ring installation spaces as well as those for O-rings with a back ring.
Merkel® Pinmatic
One-piece, dual-action compact seal made of polyurethane to seal joint bolts. Internal sealing. Insensitive to pressure peaks.
Merkel® Stircomatic SRC
One-piece compact seal made of polyurethane for high operating pressures up to 80 MPa. High operating reliability and extrusion stability. Simple, secure mounting.
O-Rings
Usage mainly for sealing stationary machine parts against liquid and gaseous media. Under certain conditions, their use as a dynamic sealing element is possible when the movements are axial, rotating and oscillating.
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Solutions Sheets
Merkel® CoverSeal PU 82
Merkel® CoverSeal PU 82 is a single-piece, double-acting compact seal made of polyurethane for static sealing, internal sealing.
Merkel® CoverSeal PU 83
Merkel® CoverSeal PU 83 is a single-piece, double-acting compact seal made of polyurethane for static sealing, internal sealing.
Merkel® O-rings
Merkel® O-rings are widely used seals, preferably as static sealing elements.
Merkel® Stircomatic SRC
Merkel® Stircomatic SRC is a single-piece compact seal made of polyurethane for static sealing, axially sealing component.
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